US8293021B2 - Instrument for cleaning an aluminum workpiece - Google Patents

Instrument for cleaning an aluminum workpiece Download PDF

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Publication number
US8293021B2
US8293021B2 US12/303,304 US30330407A US8293021B2 US 8293021 B2 US8293021 B2 US 8293021B2 US 30330407 A US30330407 A US 30330407A US 8293021 B2 US8293021 B2 US 8293021B2
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Prior art keywords
litho
strip
degreasing medium
graining
degreasing
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US12/303,304
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US20090209444A1 (en
Inventor
Bernhard Kernig
Henk-Jan Brinkman
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Speira GmbH
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Hydro Aluminium Deutschland GmbH
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Assigned to HYDRO ALUMINIUM DEUTSCHLAND GMBH reassignment HYDRO ALUMINIUM DEUTSCHLAND GMBH ASSIGNMENT OF ASSIGNORS INTEREST (SEE DOCUMENT FOR DETAILS). Assignors: KERNIG, BERNHARD, BRINKMAN, HENK-JAN
Assigned to HYDRO ALUMINIUM DEUTSCHLAND GMBH reassignment HYDRO ALUMINIUM DEUTSCHLAND GMBH CORRECTIVE ASSIGNMENT TO CORRECT THE TITLE PREVIOUSLY RECORDED ON REEL 022325 FRAME 0527. ASSIGNOR(S) HEREBY CONFIRMS THE CORRECT TITLE SHOULD READ "INSTRUMENT FOR CLEANING AN ALUMINUM WORKPIECE". Assignors: KERNIG, BERNHARD, BRINKMAN, HENK-JAN
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    • C—CHEMISTRY; METALLURGY
    • C11—ANIMAL OR VEGETABLE OILS, FATS, FATTY SUBSTANCES OR WAXES; FATTY ACIDS THEREFROM; DETERGENTS; CANDLES
    • C11D—DETERGENT COMPOSITIONS; USE OF SINGLE SUBSTANCES AS DETERGENTS; SOAP OR SOAP-MAKING; RESIN SOAPS; RECOVERY OF GLYCEROL
    • C11D3/00—Other compounding ingredients of detergent compositions covered in group C11D1/00
    • C11D3/02—Inorganic compounds ; Elemental compounds
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41N—PRINTING PLATES OR FOILS; MATERIALS FOR SURFACES USED IN PRINTING MACHINES FOR PRINTING, INKING, DAMPING, OR THE LIKE; PREPARING SUCH SURFACES FOR USE AND CONSERVING THEM
    • B41N3/00—Preparing for use and conserving printing surfaces
    • B41N3/03—Chemical or electrical pretreatment
    • B41N3/038—Treatment with a chromium compound, a silicon compound, a phophorus compound or a compound of a metal of group IVB; Hydrophilic coatings obtained by hydrolysis of organometallic compounds
    • C—CHEMISTRY; METALLURGY
    • C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
    • C23G—CLEANING OR DE-GREASING OF METALLIC MATERIAL BY CHEMICAL METHODS OTHER THAN ELECTROLYSIS
    • C23G1/00—Cleaning or pickling metallic material with solutions or molten salts
    • C23G1/14—Cleaning or pickling metallic material with solutions or molten salts with alkaline solutions
    • C23G1/22—Light metals

Definitions

  • the invention relates to a method of conditioning the surface of a work piece, in particular of a litho-strip or litho-sheet, consisting of an aluminum alloy.
  • embodiments of the invention feature a method for conditioning the surface of a work piece and a work piece consisting of an aluminum alloy, which enable an increased manufacturing speed in surface roughening and maintain at the same time a high quality of the grained surface of the work piece with relative low effort related to facility equipment.
  • a method of conditioning the surface of an aluminum work piece consisting of an aluminum alloy includes at least the step of degreasing the surface of the work piece with a degreasing medium, wherein the aqueous degreasing medium contains at least 1.5 to 3% by weight of a composite of 5-40% sodium tripolyphosphate, 3-10% sodium gluconate, 3-8% of a composite of non-ionic and anionic surfactants and optionally 0.5% to 70% soda, preferably 30-70% soda, wherein sodium hydroxide is added to the aqueous degreasing medium such that the concentration of sodium hydroxide in the aqueous degreasing medium is 0.01 to 5% by weight, preferably 0.1 to 1.5% by weight, more preferably 1 to 2.5% by weight.
  • the combination of the use of the degreasing medium together with added sodium hydroxide ensures an increased manufacturing speed during surface roughening including electro-chemical graining with sufficient results despite of the fact that oxide particles are not removed completely during degreasing.
  • the reason for the good results is seen in the fact that due to the addition of sodium hydroxide the degreasing medium has an increased pickling rate which removes more aluminum from the surface at the same time.
  • the electro-chemical graining process of litho-strips can be done with a lower charge entry therefore enabling a higher manufacturing speed.
  • the time of application of the degreasing medium to the surface of the aluminum work piece is at maximum 1 to 7 s, preferably at maximum 2 to 5 s. These application times ensure high production speeds at the same time ensuring that the oxide islands can easily be removed by surface roughening.
  • the temperature of the degreasing medium is 50 to 85° C., preferably 65° C. to 75° C.
  • the pH-value of the aqueous degreasing medium is from 10 to 14, preferably 10 to 13.5.
  • the work piece is a strip or a sheet, in particular a litho-strip or a litho-sheet.
  • the necessary electro-chemical graining process for manufacturing litho-strips or litho-sheets can be accomplished thoroughly within less time and the printing plate manufacturing speed can be increased. Furthermore, the charge entry needed can be reduced while providing a fully grained strip or sheet surface.
  • the inventive conditioning method is accomplished subsequent the manufacturing of a strip, in particular a litho-strip, and the conditioned strip is reeled on a coil.
  • a coil of a conditioned litho-strip can be provided comprising an optimum performance in further surface roughening processes used to manufacture lithographic printing plates.
  • a work piece consisting of an aluminum alloy is conditioned by the inventive method.
  • the inventive work piece provides a cleaned surface with an optimum performance for a subsequent electro-chemical graining process.
  • the work piece is a strip or a sheet, in particular a litho-strip or a litho-sheet.
  • Litho-strip or sheets are produced for lithographic printing plates and differ from “normal” sheets due to the aluminum alloy they consist of and their specific thickness, which is typically less than 1 mm, preferably 0.14 to 0.5 mm, more preferably 0.25 to 0.3 mm.
  • the surface of litho-strips and sheets has to be prepared for a roughening process, since manufacturing of lithographic printing plates generally comprises an electro-chemical graining process to prepare the surface of the lithographic printing plates for the printing process.
  • inventive sheets or strips in particular with the inventive litho-sheets or litho-strips, the necessary electro-chemical graining of the surface can be accomplished in shorter time with a reduced charge entry.
  • the mechanical features and an improved graining structure during electro-chemical graining can be provided if the aluminum alloy of the work piece is one of the aluminum alloys AA1050, AA1100, AA3103 or AlMg0.5.
  • These aluminum alloys provide the mechanical strength needed for lithographic printing plates while enabling due to the low amount of alloying constituents a homogeneous graining of the surface.
  • work pieces consisting of other aluminum alloys may provide the same advantages.
  • the aluminum alloy contains the following alloying constituents in percent by weight:
  • impurities each less than 0.005% in sum max. 0.15%, rest Al or
  • impurities each less than 0.005% in sum max. 0.15%, rest Al or
  • impurities each less than 0.005% in sum max. 0.15%, rest Al.
  • Work pieces consisting of one of the three aluminum alloys and conditioned with the inventive method have state of the art mechanical and graining properties, in particular if the work pieces are litho-strips which are grained electro-chemically after conditioning. It was surprisingly observed that in particular the latter aluminum alloys conditioned with the inventive conditioning method show a higher sensitivity in subsequent surface roughening processes. As a result despite of the inventive single step conditioning method, which reduces the expenses for the conditioning equipment significantly, an increase in plate manufacturing speed for litho-strips and sheets is achievable.
  • FIG. 1 provides a microscopic view of the surface of a litho-strip degreased conventionally
  • FIG. 2 provides a microscopic view of the surface of a litho-strip degreased with the inventive method.
  • the different aluminum alloys have the following compositions of alloying constituents in weight percent:
  • impurities each less than 0.005% in sum max. 0.15%, rest Al.
  • impurities each less than 0.005% in sum max. 0.15%, rest Al.
  • Litho-strips made from the aluminum alloys mentioned above where tested with regard to their graining behaviour on industrial plate manufacturing lines.
  • the degreasing medium used contains at least 1.5 to 3% by weight of a composite of 5 to 40% sodium tripolyphosphate, 3 to 10% sodium gluconate, 30 to 70% soda and 3 to 8% of a composite of non-ionic and anionic surfactants, with an addition of sodium hydroxide in the amount of 1% by weight.
  • the comparative examples were degreased with the same conditions without the addition of sodium hydroxide to the degreasing medium. The results of the examples are shown in table 1
  • the litho-strips degreased with the inventive method generally show a good appearance after electro-chemical graining even if the graining velocity was increased.
  • litho-strips degreased with the inventive method show even better graining results, because the surface of the litho-strip grained with the inventive method have a finer, more homogeneous and more shallow graining structure.
  • This graining structure provides improved printing characteristics of the inventive litho-strips.
  • the inventive method provides said improved graining structure even at higher manufacturing speeds, as can be derived from the results of strip 1 and strip 2.
  • Strip 1 degreased conventionally shows merely good appearance results after electro-chemical graining at a graining velocity of 50 m/min.
  • strip 2 degreased with the inventive method allows 55 m/min graining velocity.
  • FIG. 1 and FIG. 2 show the different graining structures of the conventional and inventive degreasing method.
  • FIG. 2 shows, as already mentioned, a microscopic view of the surface of a litho-strip consisting of the aluminum alloy A degreased with the inventive method after electro-chemical graining.
  • FIG. 1 shows the graining result of the same litho-strip degreased conventionally.
  • the graining pattern achieved with the inventive method is finer and more shallow compared to the graining pattern achieved with a conventionally degreased litho-strip. As a result, the printing characteristics of the inventive litho-strips are improved significantly.
  • the present embodiments of the invention has been achieved by the addition of 1% per weight sodium hydroxide. It is expected that a higher concentration of sodium hydroxide combined with an decreased contact time of the strip with the degreasing medium will lead to similar results.

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  • Chemical & Material Sciences (AREA)
  • Organic Chemistry (AREA)
  • Engineering & Computer Science (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Mechanical Engineering (AREA)
  • Materials Engineering (AREA)
  • General Chemical & Material Sciences (AREA)
  • Metallurgy (AREA)
  • Inorganic Chemistry (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Oil, Petroleum & Natural Gas (AREA)
  • Wood Science & Technology (AREA)
  • Cleaning And De-Greasing Of Metallic Materials By Chemical Methods (AREA)
  • Printing Plates And Materials Therefor (AREA)
  • Cleaning By Liquid Or Steam (AREA)
US12/303,304 2006-06-06 2007-06-06 Instrument for cleaning an aluminum workpiece Active 2029-07-28 US8293021B2 (en)

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
EP06115002.5 2006-06-06
EP06115002 2006-06-06
EP06115002 2006-06-06
PCT/EP2007/055586 WO2007141300A1 (en) 2006-06-06 2007-06-06 Method for cleaning an aluminium workpiece

Related Parent Applications (1)

Application Number Title Priority Date Filing Date
PCT/EP2007/055586 A-371-Of-International WO2007141300A1 (en) 2006-06-06 2007-06-06 Method for cleaning an aluminium workpiece

Related Child Applications (1)

Application Number Title Priority Date Filing Date
US13/617,552 Continuation US8449689B2 (en) 2006-06-06 2012-09-14 Instrument for cleaning an aluminum workpiece

Publications (2)

Publication Number Publication Date
US20090209444A1 US20090209444A1 (en) 2009-08-20
US8293021B2 true US8293021B2 (en) 2012-10-23

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US12/303,304 Active 2029-07-28 US8293021B2 (en) 2006-06-06 2007-06-06 Instrument for cleaning an aluminum workpiece
US13/617,552 Active US8449689B2 (en) 2006-06-06 2012-09-14 Instrument for cleaning an aluminum workpiece

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Application Number Title Priority Date Filing Date
US13/617,552 Active US8449689B2 (en) 2006-06-06 2012-09-14 Instrument for cleaning an aluminum workpiece

Country Status (6)

Country Link
US (2) US8293021B2 (ja)
EP (2) EP2024190B9 (ja)
JP (1) JP5001359B2 (ja)
CN (2) CN103924252B (ja)
ES (2) ES2385469T3 (ja)
WO (1) WO2007141300A1 (ja)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US8449689B2 (en) * 2006-06-06 2013-05-28 Hydro Aluminium Deutschland Gmbh Instrument for cleaning an aluminum workpiece

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2444254B1 (de) 2010-10-22 2013-07-10 Hydro Aluminium Rolled Products GmbH Lithoband für die elektrochemische Aufrauung sowie Verfahren zu dessen Herstellung
EP2623639A1 (de) 2012-02-02 2013-08-07 Hydro Aluminium Deutschland GmbH Aluminiumlegierungsband mit verbesserter Oberflächenoptik und Verfahren zu dessen Herstellung
EP2660043B1 (de) * 2012-05-04 2021-03-03 Hydro Aluminium Rolled Products GmbH Verwendung eines Aluminiumverbundwerkstoffes für das flussmittelfreie Löten
WO2021191425A1 (de) 2020-03-26 2021-09-30 Hydro Aluminium Rolled Products Gmbh Lithoband mit flacher topographie und daraus hergestellte druckplatte

Citations (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4602963A (en) 1985-01-07 1986-07-29 Surface Treatments, Inc. Method for metal cleaning
EP0201864A2 (en) 1985-05-13 1986-11-20 HENKEL CORPORATION (a Delaware corp.) Alkaline cleaner for aluminum
DE3600415A1 (de) 1986-01-09 1987-07-16 Canning Gmbh W Verfahren und vorrichtung zur vorbehandlung von zum galvanisieren vorgesehenem aluminiummaterial
US4945004A (en) 1987-04-28 1990-07-31 Hoechst Ag Base material for an aluminum offset printing plate
US5114607A (en) * 1990-08-08 1992-05-19 Betz Laboratories, Inc. Low foaming alkaline cleaner comprising a surfactant mixture of an EO-PO-EO block copolymer and a PO-ZO-PO block copolymer
DE4317815C1 (de) 1993-05-28 1994-06-01 Vaw Ver Aluminium Werke Ag Verfahren und Vorrichtung zur Reinigung von Aluminiumspänen
US5520841A (en) 1992-05-18 1996-05-28 Henkel Kommanditgesellschaft Auf Aktien Pumpable alkaline cleaning concentrates
US5795541A (en) 1996-01-05 1998-08-18 Kabushiki Kaisha Kobe Seiko Sho Aluminum alloy sheet for lithographic printing plates and method for manufacturing the same
US5997721A (en) 1994-12-19 1999-12-07 Alcan International Limited Cleaning aluminum workpieces
US6447982B1 (en) * 1999-07-02 2002-09-10 Vaw Aluminium Ag Litho strip and method for its manufacture
WO2006122852A1 (en) 2005-05-19 2006-11-23 Hydro Aluminium Deutschland Gmbh Conditioning of a litho strip

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JPH0627914B2 (ja) * 1985-03-15 1994-04-13 日本放送協会 光学素子
ZA863258B (en) * 1985-05-13 1986-12-30 Amchem Prod Alkaline cleaner for aluminum
US5200114A (en) * 1990-08-24 1993-04-06 Man-Gill Chemical Company Alkaline cleaner for reducing stain on aluminum surfaces
JP2002206183A (ja) * 2001-01-09 2002-07-26 Showa Denko Kk アルミニウム製切削加工品用脱脂洗浄剤およびこれを用いたアルミニウム製切削加工品の脱脂洗浄方法
WO2003035407A1 (fr) * 2001-10-22 2003-05-01 Mitsui Chemicals, Inc. Composes imide et support d'enregistrement optique fabrique a l'aide de ces composes
JP5051679B2 (ja) * 2003-08-29 2012-10-17 日本パーカライジング株式会社 アルミニウムまたはアルミニウム合金製ｄｉ缶のアルカリ洗浄方法
US7384902B2 (en) * 2004-05-14 2008-06-10 Cleaning Systems, Inc. Metal brightener and surface cleaner
ES2385469T3 (es) * 2006-06-06 2012-07-25 Hydro Aluminium Rolled Products Gmbh Método de acondicionamiento de la superficie de una lámina litográfica o tira litográfica

Patent Citations (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4602963A (en) 1985-01-07 1986-07-29 Surface Treatments, Inc. Method for metal cleaning
EP0201864A2 (en) 1985-05-13 1986-11-20 HENKEL CORPORATION (a Delaware corp.) Alkaline cleaner for aluminum
DE3600415A1 (de) 1986-01-09 1987-07-16 Canning Gmbh W Verfahren und vorrichtung zur vorbehandlung von zum galvanisieren vorgesehenem aluminiummaterial
US4945004A (en) 1987-04-28 1990-07-31 Hoechst Ag Base material for an aluminum offset printing plate
US5114607A (en) * 1990-08-08 1992-05-19 Betz Laboratories, Inc. Low foaming alkaline cleaner comprising a surfactant mixture of an EO-PO-EO block copolymer and a PO-ZO-PO block copolymer
US5520841A (en) 1992-05-18 1996-05-28 Henkel Kommanditgesellschaft Auf Aktien Pumpable alkaline cleaning concentrates
DE4317815C1 (de) 1993-05-28 1994-06-01 Vaw Ver Aluminium Werke Ag Verfahren und Vorrichtung zur Reinigung von Aluminiumspänen
US5997721A (en) 1994-12-19 1999-12-07 Alcan International Limited Cleaning aluminum workpieces
US5795541A (en) 1996-01-05 1998-08-18 Kabushiki Kaisha Kobe Seiko Sho Aluminum alloy sheet for lithographic printing plates and method for manufacturing the same
US6447982B1 (en) * 1999-07-02 2002-09-10 Vaw Aluminium Ag Litho strip and method for its manufacture
WO2006122852A1 (en) 2005-05-19 2006-11-23 Hydro Aluminium Deutschland Gmbh Conditioning of a litho strip

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
International Search Report for International Application No. PCT/EP2007/055586.

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US8449689B2 (en) * 2006-06-06 2013-05-28 Hydro Aluminium Deutschland Gmbh Instrument for cleaning an aluminum workpiece

Also Published As

Publication number Publication date
ES2528027T3 (es) 2015-02-03
CN101460313A (zh) 2009-06-17
WO2007141300A1 (en) 2007-12-13
US20090209444A1 (en) 2009-08-20
JP2009540116A (ja) 2009-11-19
US20130048033A1 (en) 2013-02-28
EP2024190A1 (en) 2009-02-18
JP5001359B2 (ja) 2012-08-15
CN103924252A (zh) 2014-07-16
EP2468525A1 (en) 2012-06-27
EP2024190B9 (en) 2012-09-05
CN103924252B (zh) 2017-08-18
EP2468525B1 (en) 2014-10-15
ES2385469T3 (es) 2012-07-25
CN101460313B (zh) 2015-05-13
EP2024190B1 (en) 2012-04-11
US8449689B2 (en) 2013-05-28

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